4.
    发明专利
    未知

    公开(公告)号:DE69631855D1

    公开(公告)日:2004-04-22

    申请号:DE69631855

    申请日:1996-05-24

    Applicant: SHARP KK

    Abstract: In an image shifting mechanism (10, 100), a pair of bimorph type piezoelectric elements (22a, 22b, 122a, 122b) are disposed on both sides of a refraction plate (21, 121). The bimorph type piezoelectric elements (22a, 22b, 122a, 122b) have a cantilever structure. The base end sides of the bimorph type piezoelectric elements are bonded and secured to a stage (25), and the free end sides are sandwiched between an upper holding plate (23) and a lower holding plate (24) so as to support one end of the refraction plate (21, 121). When the bimorph type piezoelectric elements (22a, 22b; 122a, 122b) are displaced, the refraction plate (21, 121)can be inclined around its rotation center O. In the case of this structure, the specifications of the refraction plate and the bimorph type piezoelectric elements (22a, 22b: 122a, 122b) are determined so that the relationship between the moment of inertia Ic around the rotation center of the moving portions of the image shifting mechanism and the moment of inertia Ig around the center of gravity of the image shifting mechanism is Ic/Ig

    5.
    发明专利
    未知

    公开(公告)号:DE69531271T2

    公开(公告)日:2004-04-22

    申请号:DE69531271

    申请日:1995-05-26

    Applicant: SHARP KK

    Abstract: A refracting plate (1) is installed in the center of an actuator provided with a gimbaling mechanism element (2), which includes rotation supporting portions (2cx), (2cy). A pair of voice coil motors (5x), (5y) are provided for each of the X- and the Y-axis in order to incline the refracting plate (1) about the respective rotation supporting portions (2cx), (2cy), and their own bobbins press the middle parts of the respective sides of the gimbaling mechanism element (2).

    6.
    发明专利
    未知

    公开(公告)号:NL1015456A1

    公开(公告)日:2000-12-19

    申请号:NL1015456

    申请日:2000-06-16

    Applicant: SHARP KK

    Abstract: PURPOSE: To provide an objective lens device for an optical pickup capable of stably holding an interval between first and second lenses when focus servo or track servo operated with the variable interval between the first and second lenses. CONSTITUTION: The objective lens device 1 comprises a first lens 2, a second lens 3, a distance varying driver 4 having first lens supporting elastic elements 7a, 7b for varying a distance between the first and second lenses 2 and 3, and an objective lens driver 5 for driving the first and second lenses 2, 3 and the driver 4 in a focusing direction or a tracking direction. A center of gravity of an optical axis direction varying portion becoming variable in the case of altering the distance between the first and second lenses is disposed to become a substantially center of the optical axis direction of the elements 7a, 7b.

    7.
    发明专利
    未知

    公开(公告)号:DE602006005768D1

    公开(公告)日:2009-04-30

    申请号:DE602006005768

    申请日:2006-11-22

    Applicant: SHARP KK

    Abstract: A lens driving device has first and second driving units for moving first and second lens holders supporting first and second sets of lens elements in an optical axis direction, respectively. The first and second driving units each have a motor, a gear fitted around an output shaft of the motor, a lead screw rotated by the gear, and a nut fitted around the lead screw. The output shafts of the first and second motors overlap each other in their axial direction. The first and second driving units move the first and second lens holders in the optical axis direction via the respective nuts moving in the optical axis direction. An image pickup plane side end face of the motor of the first driving unit is positioned more to the image pickup plane side than a position most to the subject side of the second lens holder is.

    8.
    发明专利
    未知

    公开(公告)号:DE69631855T2

    公开(公告)日:2005-01-27

    申请号:DE69631855

    申请日:1996-05-24

    Applicant: SHARP KK

    Abstract: In an image shifting mechanism (10, 100), a pair of bimorph type piezoelectric elements (22a, 22b, 122a, 122b) are disposed on both sides of a refraction plate (21, 121). The bimorph type piezoelectric elements (22a, 22b, 122a, 122b) have a cantilever structure. The base end sides of the bimorph type piezoelectric elements are bonded and secured to a stage (25), and the free end sides are sandwiched between an upper holding plate (23) and a lower holding plate (24) so as to support one end of the refraction plate (21, 121). When the bimorph type piezoelectric elements (22a, 22b; 122a, 122b) are displaced, the refraction plate (21, 121)can be inclined around its rotation center O. In the case of this structure, the specifications of the refraction plate and the bimorph type piezoelectric elements (22a, 22b: 122a, 122b) are determined so that the relationship between the moment of inertia Ic around the rotation center of the moving portions of the image shifting mechanism and the moment of inertia Ig around the center of gravity of the image shifting mechanism is Ic/Ig

    10.
    发明专利
    未知

    公开(公告)号:DE69531271D1

    公开(公告)日:2003-08-21

    申请号:DE69531271

    申请日:1995-05-26

    Applicant: SHARP KK

    Abstract: A refracting plate (1) is installed in the center of an actuator provided with a gimbaling mechanism element (2), which includes rotation supporting portions (2cx), (2cy). A pair of voice coil motors (5x), (5y) are provided for each of the X- and the Y-axis in order to incline the refracting plate (1) about the respective rotation supporting portions (2cx), (2cy), and their own bobbins press the middle parts of the respective sides of the gimbaling mechanism element (2).

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